问题描述：
long ago 和 long before
Mrsmith said that he had been to shenzhen----------A once amonth B after a month C long ago D long before这道题题我知道A和B 是肯定排除的,long ago 和 long before怎么去区别啊,他们都是说以前的意思啊?
Mrsmith said that he had been to shenzhen----------A once amonth B after a month C long ago D long before这道题题我知道A和B 是肯定排除的,long ago 和 long before怎么去区别啊,他们都是说以前的意思啊?
问题解答：
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